(19)

(11)

EP 2 429 814 A1

(12)

(43) Date of publication: 21.03.2012 Bulletin 2012/12 (21) Application number: 10716976.5 (22) Date of filing: 28.04.2010

(51) International Patent Classification (IPC):  B32B 15/01(2006.01) (86) International application number: PCT/US2010/032735 (87) International publication number: WO 2010/126987 (04.11.2010 Gazette 2010/44)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 30.04.2009 US 174324 P 27.04.2010 US 768429 (71) Applicant: Alcoa Inc. Alcoa Center, PA 15069 (US)	(72) Inventors: KAMAT, Rajeev G. Murrysville Pennsylvania 15668 (US) BUTLER JR., John F. Lititz Pennsylvania 17543 (US) (74) Representative: Trinks, Ole  Meissner, Bolte & Partner GbR Widenmayerstrasse 48 80538 München 80538 München (DE)